AirStage ARXB07LALH, Service Manual

Page: 87 / 207

Outdoor Unit Network
Communication 1 Error
OK
Communication PCB connection check
Communication PCB check
OK
Communication line connection, open check
OK
OK
Check Point 5 : Check the communication PCB (outdoor unit/indoor unit)
OK
Outdoor unit Main PCB
Outdoor unit communication PCB
1. Noise, momentary open, voltage drop 2. Indoor unit power off
3. Communication line connection defective 4. Terminal resistor setting mistake
5. Communication PCB mounting defective, Communication PCB defective 6. Main PCB defective
Check Point 1 : Noise, momentary open, voltage drop
Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly or there are no related cables near the power line.
Check Point 2 : Check the indoor unit power supply
Main power ON check
Power cable connection and open check
Check Point 3 : Check the communication line connection
No communication for 180 seconds or more from an indoor unit which
received communication once and no outdoor network communication error 2.
Check Point 4 : Check the Terminal resistor setting
Terminal resistor setting check
Check Point 6 : Replace Main PCB (outdoor unit / indoor unit)
Change Main PCB and set up the original address.
Indoor Unit : No display
Outdoor Unit : E. 14. 1
Error Code : 14
04-23
Trouble shooting 13 Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :